WPF Datagrid Multiple Selection without CTRL or Space

Question

The WPF Datagrid has two selection modes, Single or Extended. The WPF ListView has a third - Multiple. This mode allows you to click and select multiple rows without CTRL or

Answer 1

Based on a previous article, i wrote a ("like") MVVM code:

Firstly add this to your main View:

  xmlns:i="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity"

The relevant part of View:

More information about EventToCommandBehavior: here

In this way, your ViewModel must implement these commands:

    //i skipped the TouchCommand definition because MouseCommand runs for touch on screen too.
    public RelayCommand MouseCommand
    {
        get
        {
            return new RelayCommand((e)=> {
                if (e.LeftButton == MouseButtonState.Pressed)
                {
                    //call this function from your utils/models
                    var row = FindTemplatedParentByVisualParent((FrameworkElement)e.OriginalSource,typeof(ICommandSource));
                    //add ICommanSource to parameters. (if actual cell contains button instead of data.) Its optional.
                    if(row!=null) 
                    {
                        row.IsSelected = !row.IsSelected;
                        e.Handled = true;
                    }  
                }                 
            });
        }
    }

Finally implement a method (somewhere in Model) to find the row(s).

   public static T FindTemplatedParentByVisualParent(FrameworkElement element,Type exceptionType = null) where T : class
    {
        if (element != null && (exceptionType == null || element.TemplatedParent == null || (exceptionType != null  && element.TemplatedParent !=null && !exceptionType.IsAssignableFrom(element.TemplatedParent.GetType()))))
        {
            Type type = typeof(T);
            if (type.IsInstanceOfType(element.TemplatedParent))
            {
                return (element.TemplatedParent as T);
            }
            else
            {
                return FindTemplatedParentByVisualParent((FrameworkElement)VisualTreeHelper.GetParent(element));
            }
        }
        else
            return null;
    }

This solution works for me perfectly so i hope it will help for you too.